Week One of the 2015 Pro Day season produced some eye-popping results that could help some under-the-radar prospects hear their name called in the later rounds. Some higher profile prospects (like Nebraska's Randy Gregory) also solidified their stock with impressive performances in timed and positional drills.

Gregory, NFLDraftScout.com's No. 3 overall prospect and top-rated defensive end may be forced to prove agile enough to handle the transition to outside linebacker after weighing in at just 235 pounds Friday at the Combine.